Pulverizing or crushing machine



June 14, 1932.. En E. ELzl-:MEYER ET AL PULVERIZING OR CRUSHING MACHINEFiled Nov. 1o, 1930 Patented June i4, 1932 1,862,889

UNITED STATES PATENT OFFICE EDWIN E. ELZEMEYER AND HENRY C. GRIESEDIECK,OF WEBSTER GROVES, MISSOURI,

ASSIGNORS TO AMERCAN EULVEEIZ'ER COMPANY, OF ST. LOUIS, MSSOURI, A COR-PORATION OF MSSGUB- PULVEBIZING OR GRUSIIING MACHINE f Application filedNovember 10, 1930. Serial No. 494,661. i

This invention relates generally to pulbase-1nember1 formaterial-grinding co-opverizing or crushing machines and, morepareration with the hammers 6, is a concave or ticularly, to a certainnew and useful imarcuate memberl 7, which, suitably pivoted, provenientin such machines of the rotary as at 8, to the central lower part of there- .'5 hammer type. y spective side walls of the base 1', is, by means85 Our invention has for its chief object the of an eccentricallyrotatable bar 9 inter# provision, in a machine of the type stated,mediately supporting the concave 7, shiftable of means adapted for theremoval from the swingably towards or from the shaft 3 for Y machine ofsuch relatively uncrushable mapresentation of its upper and lowergrinding 10 terial as hard ore, tramp iron, straw, paper, surfaces'lO,11, respectively, more or less ec- Bo rags, dunnage, or the like, as maybe mixed centrically to the path or revolution of the with the productto be crushed or ground, hammers 6, the grinding surface 10,we mightsuch removal being effected by virtue Iof the add, being preferably,though not necessarelative differences in momentum of thev unrily,imperforate, for effective grinding ofthe crushable material withrespect to the material, and the grinding surface 11 being 66 crushedmaterial. apertured for passage of the ground or pulI And with the aboveand other objects in verized material therethrough. view, our inventionresides in the novel fea- Provided in the upper casing-section 2 andtures of form, construction, arrangement, disposed peripherally to oneside of the shaft and combination of parts hereinafter de- 3, is asuitable feed opening or hopper 12,the 70 scribed and set forth in theclaims. lower wall 13 thereof being oliquely dis- In the accompanyingdraw1ng,- posed inwardly anddownwardly toward the Figure 1 is alongitudinal sectional view hammers 6 and terminating approximately of apulverizing or crushing machine ernat the upper end of the concave 7 forguiding bodying our invention; and or feeding the material to be groundthere- 75 Figure 2 is a fragmentary sectional view upon.r of the machinetaken approximately along The material fed to the machine is ground, theline 2-2, Figure 1. i crushed, or pulverized between the hammersvReferring now more in detail and by ref- Gand concave 7, some of theground material erence characters to the drawing, which ilescapingthrough theapertured grinding sur- 80 lustrates a preferred embodimentof our inface 11. A substantial part of the product of vention, we showa rotary hammer-mill of the machine will, however, by theco-operaconventional type, which, briefly, includes tion of the grindingmedia 6, 7, be discharged a base or lower casing-section 1 and acomplefrom the end of the concave 7 in an initially mentary orupper-casing section 2 preferably horizontally tangential directiontowards the B5 detachably mounted on the base 1, bearing opposing wallof the casing 1.

for rotation in the side walls of the casing, Obviously, such product ofthe machine is is the main shaft 3 of the machine, which supunsized,that is to say', it comprises a mixture ports a plurality of spiders 4connected toof pulverulent material, uncrushable mategether adjacent thefree ends of their several rial, and an Vamount of crushed, though notarms by a circumferential series of transpulverulent material.However,the substanversely disposed rods 5. Disposed on the tiallyhorizontal movement of the unsized respective rods 5, are so-calledring-hammaterials allows the gravity separation theremers 6, eacharranged not only .for revoluof according to the variant momentum of itstion in the kcasing 1,2. with the shaft 3, but several constituents,some of which will posalso and at the same time independently both sessa momentum sufficient to cause it to be axially rotatable about, andlaterally shiftovercast upon, and for gravitational separaable oryieldable relatively to, its respective tion by, a positive separatingor screening supporting axis or rod 5. means comprising, in the presentinstance, a

Disposed between the side walls of the plurality of spaced so-calledgrizzly bars 14 100 disposed longitudinally in the direction of movementof the material falling thereupon.

Preferably, the screening grid or bars 14 are disposed below the levelof the concave 7 to allow for the drop in the path of the materialdischarged therefrom, and the ends of the bars 14 are spaced from theend of the concave 7 providing an opening 15 through which most, if notall, of the pulverulent material is discharged from the machine, thebalance of the product falling or impinging upon the bars 14, which,selected in size and spacing suitably for the purpose, substantiallyeffect gravity separation of the material, the crushed material passingbetween the bars 14 and thus out of the machine, and the uncrushedmaterial being, as may be said, rejected and retained by the screencomposed of the bars 14, such rejected material, however, by virtue ofits residual momentum, partaking of a sliding movement on the bars 14,and from thence is overcast, or caused to pass, through an aperture 16provided in the adjacent or facing wall 17 of the base-section 1 forlodgement and collection in a suitable lateral pocket or metalreceptacle 18, so called by reason of the metallic nature of thematerial most likely to be found therein.

Inv actual practice, we might add, we prefer to make the wall 17separable from the base section 1, and to integrally unite with saidwall 17 the enclosing walls of the receptacle 18, the latter havingpreferably a sloping or inclined apertured upper wall normally closed bya hinged access door 19, and the door 19 and the receptacle-walltherebelow having suitable wearing plates or liners 20, 21.respectively.

Preferably, the wall 17 is provided with iianges 22 interfittina, andsecured by fastening elements 23 to. the respective side walls of thebase 1, and for supporting the grizzly bars 14, we prefer to provide theopposing side walls of the base 1 each with an inwardly extending lug orshelf 24, on which the grizzly rests. the end bars thereof being held onthe shelf 24 by clamps-or-hook-bolts 25. The bars 14 of the grizzly arespaced by suitable washers 2G and the grizzly as a whole is tiedtogether by bolts 27 in the conventional manner.

We are aware that the use of so-called tramp-iron poclrets is not new inthe pulverizing art. but` so far as we are aware, such pockets haveheretofore been disposed so as to readily fill with the crushablematerial as well as the tramp-iron, the latter, in many cases, beingintended to be embedded in the crushable material in the pocket.

In our present invention, the metal collected in the pocket 18 issubstantially free from either the pulveruluent or partially pulverizedmaterial, and this we accomplish by providing the grizzly bars 14 overwhich the non-crushable material slides by virtue of its momentum and ishence self-propelled for movement to a point suiciently remote from thehammers 6 to substantially effect, during such movement, the separationof the crushed or partially pulverized material from the uncrushablematerial.

It will be understood that, while not here specifically shown, thegrizzly-bars 14 may be adapted for shiftable or vibratory movement, andthat other changes and modifications in the form, construction,arrangement, and combination of the several parts of the machine may bemade and substituted for those herein shown and described with-outdeparting from the nature and principle of our invention.

Having thus described our invention, what we claim and desire to secureby Letters Patent is:

1. In a machine of the class described, in combina-tion, a casing,rotary crushing means within the casing, and a screening grid disposedhorizontally within the casing` below the path of and tangentially tosaid rotary means for separating material cast therefrom.

2. In a machine of the class described, in combination, a casing, rotarycrushing means within the casing, separating means including ascreening-grid disposed horizontally within the casing below the path ofsaid r0- tary mea-ns for receiving material tangentially cast by saidrotary crushing means, and a collecting chamber disposed laterally ofthe grid for receiving the rejects overcast from said separating means.

3. In a machine of the class described, in combination, a casing, rotarycrushing means within the casing, separating means including membersdisposed tangentially from and adapted to receive material cast by saidrotary crushing means, and collecting means adapted to receive therejects overcast from said separating means.

4. In a machine combination, a casing, rotary crushing means within thecasing, separating means including members dispos-ed in a planetangential to and below, and adapted to receive material cast by, saidrotary crushing means, and collecting means adapted to receive therejects overcast from said separating means.

5. In a machine of the class described, iI1 combination, a casing,rotary crushing means within the casing, separating means tangentiallyspaced from said crushing means for reception of material casttherefrom, and means for collecting the rejects overcast from saidseparating means.

6. In a. machine of the class described, in combination, a casing,rotary crushing means within the casing, separating means tangentiallyspaced horizontally from said crushing means for reception of materialcast thereof the class described., in

from, and means for collecting the rejects overcast from said separatingmeans.

7. In a machine of the class described, in combination, a casing, rotarycrushing means Within the casing, separat'ng means tangentially spacedfrom said crushing m-eans for reception of material horizontally casttherefrom, and means for collecting the rejects overcast from saidseparating means.

8. In a machine of the cla-ss described, in combination, a casing,rotary crushing means Within the casing, horizontally disposedseparating means tangentially spaced from said crushing means forreception of material cast therefrom, and means for collecting therejects overcast from said separating means.

9. In a machine of the class described, in combination, a casing,grinding media Within the casing, including rotary means adapted to castits product in an initially horizontal tangential direction, separatingmeans tangentially spaced from said crushing means for reception ofmaterial cast therefrom, and means for collecting the rejects overcastfrom said separating means.

10. In a machine of the class described, in

combination, a casing, grinding media disposed in the casing, saidgrinding media including rotary means adapted to cast its product in aninitially horizontal direction, separating means tangentially spacedfrom said crushing means for reception of material cast therefrom, andmeans for collecting the rejects overcast from said sepa-rating means,said collecting means including a receptacle disposed eXteriorly saidcasing.

11. In a machine of the class described, in combination, a casing,grinding media disposed in the casing, said grinding media includingrotary means adapted to cast its product tangentially toward a Wall ofsaid casing, and separating means spaced tangentially from said rotarymember and disposed adjacent said Wall of the casing for reception ofmaterial cast from said rotary member.

12. In a machine of the class described, in combination, a casing,grinding media disposed in the casing, said grinding media includingrotary mea-ns adapted to cast its product tangentially toward a Wall ofsaid casing, separating means spaced tangentially from said rotarymember and disposed adjacent said Wall of the casing for reception ofmaterial cast from said rotary member, said Wall having an aperturealigned With said separating means, and collecting means adapted toreceive material overcast from said separating means through saidaperture.

13. In a machine of the class described, in combination, a casing,grinding media disposed in the casing, said grinding media includingrotary means adapted to cast its product tangentially toward a Wall ofsaid casing, separating means spaced tangentially from said rotarymember and disposed adjacent said Wall of the casing for reception ofmaterial cast from said rotary member, said Wall being separable fromsaid casing and having an aperture aligned with said separating means,means for detachably securing said vvall in said casing, and areceptacle presented exteriorly said Wall for collecting materialovercast from said separating means.

14. In a machine of the class described, in combination, a casing,grinding media disposed in the casing, said grinding media includingrotary means adapted to cast its product tangentially toward a Wall ofsaid casing, separating means spaced tangentially from said rotarymember and disposed adjacent said Wall of the casing for reception ofmaterial cast from said rotary member, and means for supporting saidseparating means in sai casing.

15. In a machine of the class described, in combination, a casing, ahammer mechanism in the casing, a grinding concave co-operable With thehammer mechanism for eifecting an initially horizontal discharge of theproduct thereof, screening means disposed in the path of said dischargedproduct for effecting gravity separation thereof, and means forcollecting the rejected material overcast from said screening means.

16. In a machine of combination, a casing, mechanism in the casing,co-operable with the hammer mechanism for effecting an intiallyhorizontal discharge of the product thereof, screening means includingspaced bars disposed tangentially to the hammer mechanism andlongitudinally in the direction of movement of said discharged productfor effecting gravity separation thereof, and a chamber disposed inlateral relation to said bars for collecting the re- 1joected materialslidingly overcast from said ars.

17. Apparatus adapted for separating uncrushed material from crushedmaterial in the product of a pulverizing machine, Which comprises, incombination, means including a rotary hammer mechanism and aco-operating grinding concave for imparting an initially horizontalmovement to said product, screening means disposed tangentially to thehammer mechanism adapted to gravitationally receive said product foreecting separation thereof, said screening means being adapted toslidingly support the material rej ected thereby, whereby the latter mayovertravel said screening means, and a chamber for collecting saidovertraveled material.

In testimony whereof, We have signed our names to this specification.

EDWIN E. ELZEMEYER. HENRY C. GRIESEDIECK.

the class described, in a rotary hammer a grinding concave

